Lock member for an injection device and an injection device training instrument

Abstract

To provide a device that can be used to train a patient to use an injection device in a simple and safe manner.SOLUTION: Each one of an injection device and an injection device trainer (1) includes: a body portion (3); an actuator (9) positioned toward a proximal end of the body portion, the actuator (9) being movable from a proximal position to a distal position; a shield (11) positioned toward a distal end of the body portion, the shield (11) being movable between an initial position, a retracted position that is more proximal relative to the body portion than the initial position, and an extended position that is more distal relative to the body portion than the initial position; and a locking member rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position, and a second orientation in which the locking member permits the actuator to move from the proximal position to the distal position.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to an infusion device for treating an injection and an infusion device training instrument for training a user who uses the infusion device.

Background Art

[0002] When treating a patient, it is desirable to be able to handle an injection simply and safely. A conventional syringe for handling an injection includes a syringe barrel for holding a drug, a plunger fitted inside the syringe barrel, and a needle through which the drug is released when the plunger is pushed into the interior of the syringe barrel. Typically, the syringe has a cap for shielding the needle when the syringe is not being used to handle an injection, and the cap can be removed to expose the needle.

[0003] A particular problem associated with conventional syringes is that the patient may accidentally stick themselves or someone else with the needle before handling the injection. Another particular problem is that it can be difficult to correctly align the needle with the target site, and thus the injection may be administered in the wrong place. Thus, conventional syringes can be complex and potentially unsafe to use, especially for patients who are not very dexterous.

[0004] There are infusion devices designed to overcome these problems using conventional syringes. One such device includes a needle shield and a plunger that can be actuated to push a drug from the needle into the patient's body. The needle shield retracts to expose the needle when pressed against the target site, and the plunger is simultaneously pressed to administer the injection. ​​​​​​​​​​​​​ is possible. By pushing the plunger of the device onto the target site, injection can be processed in a single operation. This enables the patient to safely and simply administer the injection to themselves. In many cases, these devices are designed to be used only once, for example, by locking a needle shield in a position that covers the needle when the injection is completed. This prevents the patient from using the needle more than once and has benefits for hygiene and

[0005] A problem with known injection devices is that it can be difficult to train patients regarding the use of these devices without actually performing the injection. Therefore, appropriate training may be limited to the number of times an injection is required. Alternatively, it may be possible to use an inactive ingredient as the injectant during training. However, for health and hygiene reasons, it is desirable to avoid injecting people unnecessarily. SUMMARY OF THE INVENTION

[0006] In view of the above, there is a need for a device that can be used to simply and safely train patients who use an injection device. In addition, it is desirable to be able to use such a device multiple times so that multiple training sessions can be conducted using the same device. There is also a need for an injection device that has a simple structure and operates reliably.

[0007] In one aspect of the present invention, an injection device training instrument comprising a main body portion, and an actuator positioned towards the proximal end of the main body portion, the actuator being movable from a proximal position to a distal position, and towards the distal end of the main body portion a shield positioned, the shield having an initial position, a retracted position that is more proximal relative to the main body portion than the initial position, and an extended position that is more distal relative to the main body portion than the initial position, the shield being movable between them, and a locking member that is rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, the injection device training instrument comprising: The first orientation of the locking member is configured to hold the shield in the initial position so as to prevent the shield from moving from the initial position to the extended position, and to allow movement of the shield from the initial position to the retracted position. The shield is configured to contact the locking member when moving from the initial position to the retracted position in order to move the locking member from the first orientation to the second orientation. Movement of the actuator a first distance towards the distal position unlocks the shield from the locking member so that the shield can move towards the extended position. Therefore, the injection device training instrument accurately simulates the use of the injection device, thereby improving the training process. In addition, the user can practice the injection process more times compared to a situation where training is only possible when an actual injection is required. The locking member provides a mechanism for simulating the use of the injection device.

[0008]

[0009] In another aspect of the present invention, there is provided an injection device that is connected to a chamber for storing a fluid a needle, a main body portion, and an actuator positioned toward the proximal end of the main body portion, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber through the needle a shield positioned toward the distal end of the main body portion, the shield having an initial position covering the needle, a retracted position exposing the needle, the retracted position being more proximal to the main body portion than the initial position, and an extended position covering the needle, the extended position being more distal to the main body portion than the initial position, the shield being movable between the initial position, the retracted position, and the extended position, and a locking member that is rotatable between a first orientation that resists movement of the actuator from the proximal position to the distal position and a second orientation that allows movement of the actuator from the proximal position to the distal position. The first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position, and to allow movement of the shield from the initial position to the retracted position. The shield is configured to contact the locking member when moving from the initial position to the retracted position to move the locking member from the first orientation to the second orientation. Movement of the actuator a first distance toward the distal position unlocks the shield from the locking member so that the shield can move toward the extended position. This provides a structure for an injection device that supports reliability and ease of manufacture.

[0010]

[0011] In another aspect of the present invention, there is a method for training a user to use an injection device, comprising: The method includes providing an injection device trainer, the injection device trainer including a body portion and an injection device trainer. An actuator positioned toward the proximal end of the body, the actuator moving from the proximal position to the distal position. and a seal positioned toward the distal end of the body portion. a retracted position that is more proximal to the body portion than the initial position; and an extended position that is more distal to the body portion than the initial position. a locking member for locking movement of the actuator from the proximal position to the distal position. A first orientation in which the member resists and locks movement of the actuator from a proximal position to a distal position. and a locking member rotatable between the first orientation and the second orientation permitted by the locking member. The first orientation of the member is adapted to prevent the shield from moving from the initial position to the extended position. and configured to hold the shield in an initial position and to move the shield from the initial position to a retracted position. The method includes moving the locking member from a first orientation to a second orientation to enable movement of the shield. In order to move the shield, the shield is moved from the initial position to the retracted position so that the shield comes into contact with the locking member. and actuating the actuator so that the shield moves toward the extended position. a first distance toward a distal position to unlock the shield from the locking member. and

[0012] In another aspect of the present invention, there is a method of processing an injection, the method comprising providing an injection device the injection device comprising a needle coupled to a chamber for storing a fluid; a body; an actuator located toward the proximal end of the body and housed within the chamber; To dispense the dispensed fluid from the needle, an actuator that is movable from a proximal position to a distal position, a shield positioned toward the distal end of the main body, the shield covering the needle in an initial position, a retracted position where the shield exposes the needle, which is closer to the main body than the initial position, a retracted position, and an extended position where the shield covers the needle, which is more distal to the main body than the initial position, a shield that is movable between the extended position, and, a locking member that is rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member enables movement of the actuator from the proximal position to the distal position. The first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position, and to enable movement of the shield from the initial position to the retracted position. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member. The first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position, and to enable movement of the shield from the initial position to the retracted position. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member. The method further includes moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, and moving the actuator a first distance toward the distal position so that the shield moves toward the extended position to unlock the shield from the locking member.

[0013] In another aspect of the present invention, there is an injector trainer for training a user of an injector device, the injector trainer comprising a main body and an actuator positioned toward the proximal end of the main body, the actuator being movable from a proximal position to a distal position. The main body includes a main body protrusion, and the actuator includes an actuator The main body includes a main body protrusion, and the actuator includes an actuator The main body includes a main body protrusion, and the actuator includes an actuator When in the distal position, by connecting with the body protrusion, the actuator is in the distal position is provided with a latch arranged to hold it.

[0014] In this way, the connection between the latch and the body protrusion indicates that the actuator has reached the distal position, which simulates the completion of the injection being processed by the injection device . Thus, the user can be trained to determine that the injection has been properly processed .

[0015] In another aspect of the present invention, there is an injection device comprising a needle connected to a chamber for storing fluid, a body part, and an actuator positioned towards the proximal end of the body part, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle . The body part comprises a body protrusion, and the actuator is provided with a latch arranged to hold the actuator in the distal position by connecting with the body protrusion when the actuator is in the distal position .

[0016] In this way, the connection between the latch and the body protrusion indicates that the actuator has reached the distal position, which indicates the completion of the injection being processed by the injection device. Therefore, the user can more accurately determine that the injection has been properly processed .

[0017] In another aspect of the present invention, there is an injection device trainer for training a user of an injection device, comprising a body part and an actuator positioned towards the proximal end of the body part, the actuator being movable from a proximal position to a distal position . A training device is provided. The body part comprises a body protrusion, and the actuator is a latch arranged to contact the body protrusion and emit an audible sound when the actuator is in the distal position. It is provided with a latch.

[0018] In this way, the audible sound indicates that the actuator has reached the distal position, which simulates the completion of an injection being processed by an injection device. Thus, the user can be trained to determine that the injection has been properly processed. The audible sound can be such that the user can hear the sound from 1 m away from the device, or at least at a position the length of an arm away from the device. The latch may be configured to emit an audible sound exceeding a predetermined threshold intensity at a specific distance (e.g., 30 cm) from the device. For example, the predetermined threshold intensity can be 40 dB such that the intensity of the emitted sound exceeds the normal sound intensity in a quiet room. Thereby, the user can hear the sound in a normal working environment. The predetermined threshold intensity may be 50 dB, 60 dB, or even 70 dB to ensure that the user can hear the sound in various different environments. The sound may be in the form of a short sound (e.g., less than one second in length), a "click" sound. The sound is generated due to the mechanical interaction between the latch and the body protrusion and is not generated by an electronic device.

[0019] In another aspect of the present invention, there is provided an injection device comprising a needle connected to a chamber for storing a fluid, a body part, and an actuator positioned towards the proximal end of the body part, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle. ​​​​​​​​​​​​​​ There is provided an injection device comprising an actuator and being capable. The main body part has a main body protrusion and the actuator is provided with a latch arranged to contact the main body protrusion when the actuator is in the distal position and to emit an audible sound.

[0020] In this way, the audible sound indicates that the actuator has reached the distal position, which indicates the completion of the injection being processed by the injection device. Thus, the user can more accurately determine that the injection has been properly processed.

[0021] In another aspect of the present invention, there is a method for training a user of an injection device, the method including providing an injection device training instrument, the injection device training instrument comprising a main body part and an actuator positioned towards the proximal end of the main body part and being movable from a proximal position to a distal position, the main body part having a main body protrusion and the actuator having a latch. The method further includes moving the actuator from the proximal position to the distal position such that the latch engages with the main body protrusion to hold the actuator in the distal position.

[0022] In another aspect of the present invention, there is a method for processing an injection, the method including providing an injection device, the injection device comprising a needle connected to a chamber for storing fluid, a main body part, and an actuator positioned towards the proximal end of the main body part and being movable from a proximal position to a distal position to dispense the fluid stored in the chamber through the needle, the main body part having a main body protrusion and the actuator having a latch. ​ This method involves the latch connecting to the body protrusion when the actuator is in the distal position, such that the actuator is moved from the proximal position to the distal position so as to hold the actuator in the distal position. This further includes moving the actuator from the proximal position to the distal position.

[0023] In another aspect of the present invention, there is a method for training a user who uses an injection device. This method includes providing a training device for the injection device, the training device for the injection device comprising a body portion and an actuator positioned towards the proximal end of the body portion, the actuator being movable from the proximal position to the distal position, and the body portion comprising a body protrusion and the actuator comprising a latch. This method further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. The body portion includes a body protrusion, and the actuator includes a latch. This method further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. This method further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. This further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position.

[0024] In another aspect of the present invention, there is a method for handling an injection, the method including providing an injection device, the injection device comprising a needle connected to a chamber for storing a fluid, a body portion, and an actuator positioned towards the proximal end of the body portion, the actuator being movable from the proximal position to the distal position to dispense the fluid stored in the chamber from the needle, the body portion comprising a body protrusion and the actuator comprising a latch. This method further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. The body portion includes a body protrusion, and the actuator includes a latch. This method further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. The body portion includes a body protrusion, and the actuator includes a latch. This method further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. This further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position. This further includes moving the actuator from the proximal position to the distal position such that the latch contacts the body protrusion and emits an audible sound when the actuator is in the distal position.

[0025] In another aspect of the present invention, a training device for an injection device for training a user who uses the injection device An instrument, comprising a main body part, and an actuator positioned towards the proximal end of the main body part, wherein the actuator is movable from a proximal position to a distal position, and a shield positioned towards the distal end of the main body part, wherein the shield is movable between an initial position and an extended position that is more distal relative to the main body part than the initial position, and a connector that connects the actuator to the shield such that movement of the actuator from the distal position towards the proximal position pulls the shield from the extended position to the initial position, there exists an injection device training instrument. In this way, the injection device training instrument can be reset to the initial position so that the training instrument can be used again. The connector provides a mechanism for achieving this function. In another aspect of the present invention, there is provided an injection device, comprising a needle connected to a chamber for storing a fluid, a main body part, and an actuator positioned towards the proximal end of the main body part, wherein the actuator is movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle, and a shield positioned towards the distal end of the main body part, wherein the shield is movable between an initial position where the shield covers the needle, a retracted position where the shield exposes the needle and is more proximal relative to the main body part than the initial position, and an extended position where the shield covers the needle and is more distal relative to the main body part than the initial position, and a connector that connects the actuator to the shield such that movement of the actuator from the distal position towards the proximal position pulls the shield from the extended position to the initial position.

[0026]

[0027] ​​​​​​​​​​​​, there is an injection device comprising...

[0028] In this way, the injection device can be reset and returned to its initial position so that the training device can be used two or more times. The connector provides a mechanism for achieving this function. ... ...

[0029] In another aspect of the present invention, there is a method for training a user who uses an injection device. This method is to provide an injection device training instrument, which includes a main body part, an actuator positioned towards the proximal end of the main body part and movable from a proximal position to a distal position, a shield positioned towards the distal end of the main body part and movable between an initial position and an extended position that is more distal relative to the main body part than the initial position, and a connector connecting the actuator to the shield. This method further includes moving the actuator from the distal position towards the proximal position in order to use the connector to pull the shield from the extended position to the initial position. ... ... ... ... ... ... ...

[0030] In another aspect of the present invention, there is a method for handling an injection. This method includes providing an injection device, which includes a needle connected to a chamber for storing fluid, a main body part, an actuator positioned towards the proximal end of the main body part and movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle, and a shield positioned towards the distal end of the main body part, with an initial position where the shield covers the needle and a retracted position where the shield exposes the needle, and the retracted position is more distal relative to the main body part than the initial position. ... ... ... ... ... A shield that is more proximal relative thereto, a retracted position, and an extended position in which the shield covers the needle and is more distal relative to the body portion than the initial position, and is movable between the extended position and the retracted position, and a connector that connects the actuator to the shield. The method further includes moving the actuator from the distal position toward the proximal position to pull the shield from the extended position to the initial position using the connector. A shield that is movable between a retracted position that is more proximal relative thereto and an extended position in which the shield covers the needle and is more distal relative to the body portion than the initial position. A connector that connects the actuator to the shield. The method further includes moving the actuator from the distal position toward the proximal position to pull the shield from the extended position to the initial position using the connector.

[0031] In another aspect of the present invention, an injector trainer for training a user of an injector, comprising a body portion, and an actuator assembly positioned toward the proximal end of the body portion, the actuator assembly being movable from a proximal position to a distal position, the actuator assembly being connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, and a damping element connected to or connectable to the rotor to damp the rotation of the rotor. An actuator assembly positioned toward the proximal end of the body portion, the actuator assembly being movable from a proximal position to a distal position. The actuator assembly is connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor. The actuator assembly is connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor. An actuator assembly and a rotor, the actuator assembly being connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor. A damping element connected to or connectable to the rotor to damp the rotation of the rotor. There is an injector trainer.

[0032] In this way, the injector trainer can simulate the resistance provided by the drug in the injector when the actuator is depressed.

[0033] In another aspect of the present invention, an injector comprising a needle connected to a chamber for storing fluid, a body portion, and an actuator assembly positioned toward the proximal end of the body portion, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber through the needle, and the actuator assembly being movable from the proximal position to the distal position. A needle connected to a chamber for storing fluid, a body portion, and an actuator assembly positioned toward the proximal end of the body portion. The actuator is movable from a proximal position to a distal position to dispense the fluid stored in the chamber through the needle. The actuator assembly is movable from the proximal position to the distal position. ​​An actuator assembly coupled to a rotor such that movement of the actuator to a position rotates the rotor. There is an injection device comprising an actuator assembly and a damping element coupled or couplable to the rotor to damp the rotation of the rotor. In this way, the injection device can damp the advancement of the actuator towards the distal position, thereby ensuring that the fluid is not dispensed rapidly from the needle.

[0034] In another aspect of the invention, there is a method for training a user of an injection device, the method comprising providing an injection device training instrument, the injection device training instrument comprising a body portion and an actuator assembly positioned towards the proximal end of the body portion, the actuator being movable from a proximal position to a distal position, the actuator assembly being coupled to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, and a damping element coupled or couplable to the rotor to damp the rotation of the rotor. The method further comprises moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator towards the distal position by dampening the rotation of the rotor.

[0035] In another aspect of the invention, there is a method of treating an injection, the method comprising providing an injection device, the injection device comprising a needle coupled to a chamber for storing fluid, a body portion, and an actuator assembly positioned towards the proximal end of the body portion, the actuator

[0036] The ejector is movable from a proximal position to a distal position to dispense fluid stored in the chamber from the needle. The actuator assembly is coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, and there is a method of treating an injection that includes a damping element coupled to or couplable to the rotor to damp the rotation of the rotor. The method further includes moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator toward the distal position by dampening the rotation of the rotor. The locking member may include an actuator resistance surface disposed to resist movement of the actuator from the proximal position to the distal position when the locking member is in a first orientation. The actuator resistance surface may include a protrusion extending from the locking member. The actuator may include a contact surface disposed to contact the actuator resistance surface when the actuator is in the proximal position and the locking member is in the first orientation. The contact surface may include a protrusion extending from the actuator. The locking member may include at least two (or a pair of) actuator resistance surfaces. The pair of actuator resistance surfaces may be located on opposite sides of the locking member relative to each other. The actuator may include at least two (or a pair of) contact surfaces. The pair of contact surfaces may be located on opposite sides of the actuator relative to each other. This simple and reliable mechanism allows the force exerted by the actuator on the locking member to spread across the diameter of the locking member. The method further includes moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator toward the distal position by dampening the rotation of the rotor. The method further includes moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator toward the distal position by dampening the rotation of the rotor. The method further includes moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator toward the distal position by dampening the rotation of the rotor.

[0037] The locking member may include an actuator resistance surface disposed to resist movement of the actuator from the proximal position to the distal position when the locking member is in a first orientation. The actuator resistance surface may include a protrusion extending from the locking member. The actuator may include a contact surface disposed to contact the actuator resistance surface when the actuator is in the proximal position and the locking member is in the first orientation. The contact surface may include a protrusion extending from the actuator. The locking member may include at least two (or a pair of) actuator resistance surfaces. The pair of actuator resistance surfaces may be located on opposite sides of the locking member relative to each other. The actuator may include at least two (or a pair of) contact surfaces. The pair of contact surfaces may be located on opposite sides of the actuator relative to each other. This simple and reliable mechanism allows the force exerted by the actuator on the locking member to spread across the diameter of the locking member. This simple and reliable mechanism allows the force exerted by the actuator on the locking member to spread across the diameter of the locking member. This simple and reliable mechanism allows the force exerted by the actuator on the locking member to spread across the diameter of the locking member.

[0038] The locking member may comprise a cylindrical housing, and the actuator resistance surface may comprise a protrusion protruding from the surface of the cylindrical housing. The protrusion may extend only over a part of the circumference of the cylindrical housing. The locking member may comprise an inclined surface. The shield may comprise an inclined contact surface. The inclined contact surface of the shield may be arranged to interact with the inclined surface of the locking member when moving from the initial position to the retracted position in order to rotate the locking member from the first orientation to the second orientation. Thereby, a simple and reliable mechanism for rotating the locking member to the second orientation is provided. The locking member may comprise a third orientation in which the shield can move from the initial position to the extended position. The actuator may be configured to move the locking member by a first distance in order to move the locking member to the third orientation. In this way, the shield is prevented from moving to the extended position until the actuator is at least partially depressed. The extended position simulates the locked-out state of the injection device and indicates that the injection is complete. Thus, the training device cannot simulate the completion of the injection procedure until the actuator is actuated by the user. The locking member may comprise a stop arranged to hold the shield in the initial position by being located within a recess in the shield. Thereby, a simple and reliable mechanism for maintaining the shield in the initial position is provided. To enable the shield to move to the extended position, the stop may be a slot in the shield.

[0039]

[0040]

[0041] It may be arranged to move along the rod. The stop portion is configured such that when the locking member is in the first orientation, it is positioned outside the slot in the recess to hold the shield in the initial position. By moving the stop portion from the recess into the slot in this way, the stop portion can be used to enable the shield to move from the initial position to the extended position. In one embodiment, by the actuator moving the locking member from the second orientation to the third orientation, the stop portion is pushed into the slot, thereby enabling the shield to move from the initial position to the extended position. Thus, by depressing the actuator, the shield can be moved to the extended position. The stop portion may be connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from the stationary state to a flexed state toward the longitudinal axis of the training device. The stop portion in the stationary state holds the shield in the initial position. The stop portion in the flexed state enables the stop portion to move into the slot. Thereby, a highly reliable mechanism is provided to enable the shield to move from the initial position to the extended position. The training device may include a biasing element that biases the shield to move distally. Thus, the shield can automatically move from the retracted position to either the initial position or the extended position depending on the orientation of the locking member. The actuator resistance surface of the locking member may include a deflection portion. The actuator deflects

[0042] It may be arranged to move along the rod. The stop portion is configured such that when the locking member is in the first orientation, it is positioned outside the slot in the recess to hold the shield in the initial position. By moving the stop portion from the recess into the slot in this way, the stop portion can be used to enable the shield to move from the initial position to the extended position. In one embodiment, by the actuator moving the locking member from the second orientation to the third orientation, the stop portion is pushed into the slot, thereby enabling the shield to move from the initial position to the extended position. Thus, by depressing the actuator, the shield can be moved to the extended position. The stop portion may be connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from the stationary state to a flexed state toward the longitudinal axis of the training device. The stop portion in the stationary state holds the shield in the initial position. The stop portion in the flexed state enables the stop portion to move into the slot. Thereby, a highly reliable mechanism is provided to enable the shield to move from the initial position to the extended position. The training device may include a biasing element that biases the shield to move distally. Thus, the shield can automatically move from the retracted position to either the initial position or the extended position depending on the orientation of the locking member.

[0043] The stop portion may be connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from the stationary state to a flexed state toward the longitudinal axis of the training device. The stop portion in the stationary state holds the shield in the initial position. The stop portion in the flexed state enables the stop portion to move into the slot. Thereby, a highly reliable mechanism is provided to enable the shield to move from the initial position to the extended position. The training device may include a biasing element that biases the shield to move distally. Thus, the shield can automatically move from the retracted position to either the initial position or the extended position depending on the orientation of the locking member. The stop portion may be connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from the stationary state to a flexed state toward the longitudinal axis of the training device. The stop portion in the stationary state holds the shield in the initial position. The stop portion in the flexed state enables the stop portion to move into the slot. Thereby, a highly reliable mechanism is provided to enable the shield to move from the initial position to the extended position. The training device may include a biasing element that biases the shield to move distally. Thus, the shield can automatically move from the retracted position to either the initial position or the extended position depending on the orientation of the locking member. The stop portion may be connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from the stationary state to a flexed state toward the longitudinal axis of the training device. The stop portion in the stationary state holds the shield in the initial position. The stop portion in the flexed state enables the stop portion to move into the slot. Thereby, a highly reliable mechanism is provided to enable the shield to move from the initial position to the extended position.

[0044] The training device may include a biasing element that biases the shield to move distally. Thus, the shield can automatically move from the retracted position to either the initial position or the extended position depending on the orientation of the locking member. The actuator resistance surface of the locking member may include a deflection portion. The actuator deflects The training device may include a biasing element that biases the shield to move distally. Thus, the shield can automatically move from the retracted position to either the initial position or the extended position depending on the orientation of the locking member.

[0045] The actuator resistance surface of the locking member may include a deflection portion. The actuator deflects arranged to move the locking member from the second orientation to the third orientation in conjunction with the actuator portion may be. Thus, the actuator depresses the deflecting portion and moves the locking member in a direction that enables the shield to move to the extended position

[0046] The training device may include a biasing element arranged to bias the locking member in a first rotational direction The biasing element may include a torsion spring. The biasing element can bias the locking member to rotate in a first direction away from the second or third orientation Thus, the training device can be automatically reset

[0047] The biasing element can bias the locking member in a fourth direction such that when the actuator moves a distance toward the distal position and the shield is in the extended position, the locking member moves in the fourth direction The locking member in the fourth direction can prevent the shield from moving from the extended position to the initial position. Thus, when the actuator is depressed the shield can be automatically positioned in a locked-out state

[0048] The actuator may be configured to move the locking member in a first direction in conjunction with the locking member when moving from the distal position to the proximal position, thereby enabling the shield to move from the extended position to the initial position Thereby, the user can reset the training device by moving the actuator from the distal position back to the proximal position

[0049] The locking member, when the locking member is in the fourth direction and the shield is in the extended position, the locking member ​​​​​​​It may include a shield resistance surface arranged to resist the proximal movement of the old. The shield may include a contact surface arranged to contact the shield resistance surface when the locking member is in the fourth orientation and the shield is in the extended position. This helps to maintain the shield in the locked-out state.

[0050] In one embodiment, the proximal position of the actuator simulates the non-operating position of the plunger of the injection device. In one embodiment, the distal position of the actuator simulates the operating position of the plunger of the injection device. In one embodiment, the initial position of the shield simulates covering the needle of the injection device. In one embodiment, the retracted position of the shield simulates exposing the needle of the injection device. In one embodiment, the extended position of the shield simulates the locked-out state of the injection device where the shield prevents the needle from being exposed. Therefore, the training device can accurately simulate the operation of the injection device.

[0051] The latch may be configured to indicate that the actuator is in the distal position by emitting an audible sound when the latch is connected to the body protrusion. The audible sound indicates that the actuator has reached the distal position, which simulates the completion of the injection being processed by the injection device, thereby enabling the user to more accurately determine that the injection has been properly processed when using the injection device.

[0052] The latch may be configured to hold the actuator in the distal position when the latch is connected to the body protrusion. The connection between the latch and the body protrusion holds the actuator in the distal position when the actuator is distal. ​​​​​​​​​​​​Indicates reaching the position, which simulates the completion of the injection being processed by the injection device, thereby enabling the user to more accurately determine that the injection has been properly processed when using the injection device. The latch may include an elastic member. The latch is movable between a non-connected state where the latch is not connected to the body protrusion and a connected state where the latch is connected to the body protrusion. Thus, the latch can be simply bent and connected to the body part.

[0053] The elastic member may be configured to move from the connected state to the non-connected state when a force exceeding a threshold is applied to the actuator when moving the actuator from the distal position to the proximal position. Thus, the latch can firmly hold the actuator in the distal position, while allowing the user to intentionally apply a force exceeding the threshold to the actuator, enabling the training device to return to its initial configuration.

[0054] The latch may include a latch deflection portion arranged to interact with the body protrusion to move the latch from the non-connected state to the connected state. The latch may include a gripping element for gripping the body part in the connected state. In this way, the deflection portion assists in moving the latch and connecting it to the body, and the gripping element assists in connecting and maintaining the latch and the body to each other. The elastic member may include the deflection portion and / or the gripping element. The deflection portion and the gripping element may be provided on opposite sides of the latch. This provides a highly reliable latch structure.

[0055]

[0056]

[0057] ​​​​​​​​​​ The connector may resist the shield moving distally away from the initial position when the actuator is in the proximal position. In this way, the connector assists in maintaining the shield in the initial position.

[0058] The connector may allow the shield to move toward the retracted position when the actuator is in the proximal position. In this way, the connector does not prevent the shield from retracting to the retracted position.

[0059] The connector may allow the shield to move distally toward the extended position when the actuator moves toward the distal position. Thus, the connector can act to release the shield.

[0060] The connector may have an actuator interface that abuts a portion of the actuator to resist the shield moving distally away from the initial position when the actuator is in the proximal position. The abutment of the actuator interface and the actuator provides a mechanism for holding the shield in the initial position.

[0061] The actuator interface may abut the surface of the actuator facing in the proximal direction. Thus, when the actuator moves proximally, the connector can be moved by the actuator, but the actuator cannot move the connector when moving distally.

[0062] The connector may have a shield interface that abuts a portion of the shield to resist the shield moving distally away from the initial position when the actuator is in the proximal position. ​​​​​​​​​​​​​ It may have a stopper. Thereby, a mechanism for holding the shield in the initial position is provided .

[0063] The shield interface may abut against the surface of the shield facing in the distal direction. Thus, the connector can move the shield when the actuator moves proximally, but the connector does not move the shield when it moves distally. However, the connector does not move the shield when moving distally.

[0064] In another aspect of the invention, there is a kit of parts configured to be assembled into the infusion device trainer or infusion device described herein.

Brief Description of the Drawings

[0065] Embodiments of the present invention will be described by way of example only with reference to the following drawings.

Figure 1

Figure 2A

Figure 2B

Figure 2C

Figure 2D

Figure 2E

Figure 3A

Figure 3B

Figure 3C

Figure 4

Figure 5A

Figure 5B

Figure 6

Figure 7A

Figure 7B

Figure 8

Figure 9

Figure 10

Figure 11A

Figure 11B

Figure 12A

Figure 12B

Figure 12C

Figure 13A

Figure 13B

Figure 14A

Figure 14B

Figure 15

Mode for Carrying Out the Invention

[0066] Referring to FIG. 1, there is an injection device training instrument 1 for training a user who uses an injection device. The training instrument 1 includes a main body 3 having a proximal end 5 and a distal end 7.

[0067] In use, the distal end 7 of the main body 3 is positioned towards the surface of the user's body, which can be the target site where the user normally performs an injection. For use, the proximal end 5 of the main body 3 is positioned towards the user's hand used to operate the training instrument 1. The main body 3 also has on both sides of the main body 3 windows 12 that simulate the windows in an injection device used to view the drug contained in the device. The terms "proximal" and "distal" are used herein to describe the device, but these terms are used to provide context and do not require the training instrument 1 to be used in any specific orientation. The terms "first end" and "second end" can be used instead of the terms "distal end" and "proximal end" without changing the intended meaning.

[0068] The injection device training instrument 1 also includes an actuator 9 and a shield 11. The actuator 9 simulates the plunger in an injection device used to dispense the drug from the needle. The shield 11 simulates the needle shield in an injection device used to cover and expose the needle.

[0069] The injection device training instrument 1 also includes an actuator 9 and a shield 11. The actuator 9 simulates the plunger in an injection device used to dispense the drug from the needle. The shield 11 simulates the needle shield in an injection device used to cover and expose the needle.

[0070] The training device 1 is positioned above the shield 11 to prevent accidental retraction of the shield 11. The cap 13 has a removable cap 13 that can be attached to the inside of the cap. The distal end 7 of the body 3 has a pair of recesses 15 on its outer surface. The cap 13 is then positioned so that it is positioned on the raised portion 17 of the cap 13. The distal end 7 of the body portion 3 also includes a recess 15 opposite the shield 11. The recess 15 is connected to the protuberance 17 by a pair of nodes 19 that abut the surface. When moved, the shield 11 is prevented from advancing further towards the proximal end 5.

[0071] The features of the injection device trainer 1 described herein include an injection device for training a user. However, the injection device training may be the same or substantially the same. The device 1 does not include a needle to prevent the user from injecting during the training procedure. The device 1 also does not include any fluids, such as medication, contained therein, although the training device 1 may be The device may include a reservoir that simulates a reservoir for containing the drug in the implant device.

[0072] 2A to 2E, a trainer for administering an injection using the injection device trainer 1 is shown. As can be seen, Fig. 2A shows a sequence for training the user. FIG. 2B shows the training device 1 as described with reference to FIG. 1 with the cap 13 removed and the seal 2B shows the training device 1 with the shield 11 exposed. As shown in FIG. 2B, the shield 11 is initially position, which simulates the position of the needle shield on the injection device when the needle is covered. It is being done.

[0073] Referring to FIG. 2C, the user can grip the training device 1 by the actuator 9 and position the shield 11 over the target site. Then, the user can push the actuator 9 towards the distal end 7 of the body portion 3. This operation causes the shield 11 to move towards its retracted position in the direction of the proximal end 5. When the shield 11 is in its initial position, the actuator 9 is prevented from moving towards the distal end 7 relative to the body portion 3. Thus, the actuator 9 is held in the proximal position and cannot move forward forward. However, when the shield 11 reaches the retracted position, the actuator 9 can move distally along the longitudinal axis of the training device 1.

[0074] FIG. 2C shows the shield 11 in a retracted position that is more proximal to the body portion 3 than the initial position. When the shield 11 is in the retracted position, it is partially retracted inside the body portion 3. This position simulates the position of the needle shield of the injection device when the needle is exposed for treating an injection.

[0075] Referring to FIGS. 2D and 2E, when the shield 11 reaches the retracted position, the actuator 9 can move distally. FIG. 2D shows the actuator 9 moving towards the distal end 7. FIG. 2E shows the actuator 9 in the distal position, which simulates the position of the plunger inside the injection device after the injection has been treated.

[0076] Referring to FIGS. 3A - 3C, there is a sequence for resetting the injection device trainer 1 after the injection simulation is completed. Referring to FIG. 3A, the user can target The training device 1 can be removed from the target area, so that the shield 11 can be returned to the initial position and and can be moved distally to an extended position that is more distal to the body portion 3 than the retracted position. The extended position of the shield 11 prevents the needle shield of the injection device from exposing the needle. This simulates a lockout condition on the injector, shutting down the injector.

[0077] 3B-3C, in order to reset the training device 1, the user The actuator 9 can be pulled toward the proximal end 5, which causes the actuator 9 to move in the direction of the proximal end 5 as shown in FIGS. 2A-2E. The sequence described above can then be repeated. FIG. 3C shows the actuator 9 after it has reached a proximal position. When the actuator 9 is pulled to the proximal position, the shield 11 is The instrument 1 returns to its initial position so that it can be used for another training session.

[0078] 4 shows an exploded view of the injection device trainer 1. The main body portion 3 has a base portion 23 which connects to the main body portion 23. The main portion 23 is surrounded by a first outer portion 25 and a second outer portion 27. In this embodiment, the components of the body portion 3 fit together to form a body assembly. However, the body 3 may also be formed from a single piece.

[0079] The shield 11 of the training device 1 includes an outer shield portion 29 and an inner shield portion 31. The side shield part 29 extends from the base part 21, and the inner shield part 31 is located within the main body part 3. Also, a spring 33 acts as a biasing element to urge the shield 11 in the distal direction. exists.

[0080] The actuator 9 of the training device 1 includes an actuator body 35 and an end cap 37. These components are configured to allow the user to interact with them to move the actuator 9. The actuator body 35 and the end cap 37 form an outer surface that can be There is an inner part 39 of the actuator 9 located within the plunger. At the proximal end of 41, the plunger 41 is connected to a threaded plunger 41, while at the distal end of the plunger 41, The plunger 41 is connected to a tip 43 that maintains the plunger 41 in alignment with the longitudinal axis of the training device 1. In this embodiment, the actuator is The components of the actuator 9 are fitted together. However, the actuator 9 is made from a single part. It may be formed.

[0081] The plunger 41 is used to damp the rotation of the plunger 41 and thus the actuator. The actuator 9 is coupled to a damping element 45 which dampens movement of the actuator 9 towards its distal position.

[0082] The training tool 1 further includes a locking member 47 including a first locking portion 51 and a second locking portion 53. In this embodiment, the first locking portion 51 and the second locking portion 53 are connected together. These are separate components that together form the locking member 47. However, in an alternative embodiment, The locking member 47 is formed from a single piece.

[0083] The locking member 47 may be rotated around the trainer so that the locking member 47 may be positioned in different rotational orientations. The locking member 47 can rotate around the longitudinal axis of the tool 1. The locking member 47 cannot move proximally or distally relative to the main body 3. The locking member 47 has a first orientation that resists movement of the actuator 9 from a proximal position (as shown in FIGS. 2A-2B) to a distal position (as shown in FIG. 2E). Thus, the first orientation of the locking member 47 is configured to hold the actuator 9 in the configuration described with reference to FIGS. 2A-2B. Also, the first orientation of the locking member 47 prevents movement of the shield 11 from an initial position to an extended position (as shown in FIGS. 3A-3B) and allows movement of the shield 11 from the initial position to a retracted position (as shown in FIG. 2C), and is configured to hold the shield 11 in an initial position (as shown in FIG. 2B). The locking member 47 also has a second orientation that allows the locking member 47 to allow movement of the actuator 9 from the proximal position to the distal position. Thus, the second orientation of the locking member 47 is configured to allow the actuator 9 to move to the position shown in FIG. 2E.

[0084] The training device 1 also includes a biasing element 55, which in this embodiment is a torsion spring. The biasing element 55 biases the locking member 47 in a first rotational direction 57. The first rotational direction 57 may be clockwise or counterclockwise depending on the orientation of the training device 1.

[0085] The training device 1 further includes an inner housing 59 that simulates a syringe of an injection device and a grip 61 that holds the inner housing in a fixed position.

[0086] FIGS. 5A-5B show the training device 1 having the same configuration as that described with reference to FIGS. 2A-2B, with the actuator 9 in the proximal position and the shield 11 in the initial position. This

[0087] ​​​​​​​In the configuration, the lock member 47 is the first to prevent the actuator 9 from moving in the distal direction. It is in the 1 orientation.

[0088] Referring to FIGS. 5A-5B and 6, the lock member 47 includes an actuator resistance surface 63 having a protrusion that protrudes from a part of the outer surface of the cylindrical housing of the lock member 47. The actuator resistance surface 63 protrudes from the lock member 47 in a direction away from the longitudinal axis of the training device 1. The actuator 9 includes a contact surface 65 having a protrusion that protrudes from a part of the inner surface of the actuator 9. The contact surface 65 protrudes from the actuator 9 in a direction toward the longitudinal axis of the training device 1. The contact surface 65 is arranged to contact the actuator resistance surface 63. Therefore, the actuator resistance surface 63 is configured to resist the movement of the actuator 9 from the proximal position to the distal position when the lock member 47 is in the first orientation.

[0089] In the training device 1, there are two actuator resistance surfaces 63. In this embodiment, the actuator resistance surfaces 63 are positioned on opposite sides of the lock member 47. This allows the force pushing down the actuator 9 to spread across the entire lock member 47. There are also two corresponding contact surfaces 65, which in this embodiment are positioned on opposite sides of the actuator 9.

[0090] The lock member 47 includes a stop portion 67 disposed within a recess 69 within the inner shield portion 31 of the shield 11. The stop portion 67 prevents the shield 11 from moving distally from the initial position to the extended position, but allows the shield 11 to move proximally toward the retracted position. ​​​​​​​​​​​makes it possible. In this embodiment, the locking member 47 has a pair of stop portions 67 positioned on opposite sides of the locking member 47. The inner shield portion 31 has a pair of corresponding recesses 69 on opposite sides of the inner shield portion 31. The recess 69 defines an opening having dimensions similar to or the same as the window 12 described with reference to FIG. 1.

[0091] FIGS. 7A-7B show the training device 1 having the same configuration as that described with reference to FIG. 2C, with the actuator 9 in the proximal position and the shield 11 in the retracted position. In this configuration, as will be described in more detail below, the locking member 47 is rotated in a second orientation that allows the actuator 9 to move in the distal direction.

[0092] Referring to FIGS. 5A and 6, the locking member 47, in this embodiment, includes an inclined surface 71 that is an angled surface extending from the outer surface of the second locking portion 53. The inner shield portion 31 includes, in this embodiment, an inclined contact surface 73 that is an angled surface within a recess in the inner shield portion 31. The inclined surface 71 and the inclined contact surface 73 are shaped and positioned such that the inclined contact surface 73 rotates the locking member 47 as the shield 11 moves from the initial position to the retracted position. In this embodiment, the inclined surface 71 and the inclined contact surface 73 rotate the locking member 47 in a second rotational direction 75 that is opposite to the first rotational direction 57 in which the locking member 47 is biased.

[0093] Preferably, the locking member 47 includes a pair of inclined surfaces 71 and the shield 11 includes two inclined contact surfaces 73. Each inclined surface 71 is on an opposite side of the locking member 47 relative to the other. This may also be the case. Each inclined contact surface 73 is on the opposite side of the shield 11 with respect to the other This helps to reduce the frictional force on the locking member 47 and the shield 11 do.

[0094] When the shield 11 moves to the retracted position, the locking member 47 rotates in the second direction. This is shown in FIGS. 7A-7B. Here, the protrusion formed by the inclined surface 71 is fitted into the recess formed by the inclined contact surface 73 in order to hold the shield 1 11 in the retracted position. It can be seen that when the locking member 47 is in the second direction, the gap 77 formed at the end of the actuator resistance surface 63 is at least partially rotatably aligned with the contact surface 65 so that the contact surface 65 can pass through the gap 77. Therefore, the contact surface 65 can move beyond the actuator resistance surface 63, and the actuator 9 can begin to move from the proximal position towards the distal position. The width of the contact surface 65 is the same as or less than the width of the gap 65. In embodiments where there are two contact surfaces 65 and two actuator resistance surfaces 63, the same process as described above occurs on the opposite side of the training device 1.

[0095] Referring to FIG. 6, the actuator resistance surface 63 of the locking member 47 includes a deflection portion 7 9 configured to be interlocked with the contact surface 65 of the actuator when the actuator moves distally. When the contact surface 65 is interlocked with the deflection portion 79, the locking member 47 further moves in the second rotational direction 75 from the second direction to the third direction. When the actuator 9 moves a first distance in the distal direction, the contact surface 65 is positioned inside the gap 77 of the locking member 47 ​​​​​​​​​It moves. Accordingly, the force of the actuator 9 moves the locking member 47 in the third direction, thereby moving the stop portion 67 into the slot 81 on the inner surface of the inner shield portion 31. When the contact surface 65 is located within the gap 77, this state holds the locking member 47 in the third direction. The contact surface 65 does not extend to the top of the actuator 9. Thus, when the contact surface 65 moves beyond the gap 77 and the shield 11 moves out of engagement with the locking member 47, the force applied by the biasing element 55 enables the locking member 47 to rotate and return in the first rotational direction.

[0096] The slot 81 in the inner shield portion 31 forms a track along which the stop portion 67 can slide. The slot 81 has an opening 83 at the proximal end of the inner shield portion 31. The slot 81 allows the shield 11 to move distally from the retracted position towards the extended position, and when the stop portion 67 reaches the opening 83, the inner shield portion 31 is released from contact with the locking member 47. When the stop portion 67 exits the opening 83 of the slot 81, the shield 11 can move to the extended position. Thereby, the shield 11 can move beyond the locking member 47 to an extended position that is distal to the position of the locking member 47 and distal to the initial position. The position of the shield 11 relative to the locking member 47 when the shield 11 is in the extended position is shown in FIG. 8, which is the configuration described with reference to FIG. 3A.

[0097] Referring to FIG. 6, the stop portion 67 is flexed inwardly by the inner shield portion 31.

[0098] Referring to FIG. 6, the stop portion 67 is deflected inwardly by the inner shield portion 31. It includes an elastic member 85 configured therein. Therefore, the elastic member 85 and the stop portion 67 can move inward toward the longitudinal axis of the training instrument 1. The stop portion 67 is, when the actuator 9 rotates the locking member 47 from the second orientation to the third orientation, pressed against the edge portion of the recess 69. As a result, the stop portion 67 and the elastic member 85 are pushed inward, and as a result, the stop portion 67 can enter the slot 81 in the inner shield portion 31. As shown, the stop portion 67 has an angled surface that assists in flexing the elastic member 85 inward.

[0099] When the training instrument 1 is in the state shown in FIGS. 3A and 8, the actuator 9 no longer holds the locking member 47 in the third orientation, and the inclined surface 71 can no longer touch the inclined contact surface 73. Therefore, the locking member 47 can rotate freely in the first rotational direction 57 and is pushed forward in this direction by the biasing element 55.

[0100] The locking member 47 rotates beyond the first orientation to a fourth orientation where a portion of the actuator 9 abuts against the reset deflection portion 87 on the locking member 47. As a result, the locking member 47 is held in the fourth orientation, thereby preventing the shield 11 from moving proximally from the extended position toward the initial position. Therefore, the shield 11 simulates the locked-out state of the injection device.

[0101] When the locking mechanism 47 is in the fourth orientation, the shield resistance surface 89 abuts against the surface at the proximal end of the inner shield portion 31. In this embodiment, the shield resistance surface 89 is a protrusion extending from the inclined surface 71. The shield resistance surface 89 prevents the shield 11 from moving proximally from the extended position. ​​​​​ Block the path of the shield 11 so that it cannot move.

[0102] As described above with reference to FIGS. 3A - 3C, the user can reset the training device 1 by pulling the actuator 9 and returning it from the distal position to the proximal position. When the actuator 9 moves in the proximal direction, the abutment surface 65 engages with the angled surface of the reset biasing portion 87 to rotate the locking mechanism 47 from the fourth orientation to the first orientation. As the actuator 9 moves in the proximal direction, the abutment surface 65 engages with the angled surface of the reset biasing portion 87 to rotate the locking mechanism 47 from the fourth orientation to the first orientation. As the actuator 9 moves in the proximal direction, the abutment surface 65 engages with the angled surface of the reset biasing portion 87 to rotate the locking mechanism 47 from the fourth orientation to the first orientation.

[0103] When the locking member 47 rotates a first angular distance in the second rotational direction 75 towards the first orientation, the shield resistance surface 89 is no longer directly above the proximal end of the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Instead, the shield resistance surface 89 is directly above the recess within the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Thus, the shield 11 can move from the extended position towards the initial position. When the locking member 47 rotates a first angular distance in the second rotational direction 75 towards the first orientation, the shield resistance surface 89 is no longer directly above the proximal end of the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Instead, the shield resistance surface 89 is directly above the recess within the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Thus, the shield 11 can move from the extended position towards the initial position. When the locking member 47 rotates a first angular distance in the second rotational direction 75 towards the first orientation, the shield resistance surface 89 is no longer directly above the proximal end of the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Instead, the shield resistance surface 89 is directly above the recess within the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Thus, the shield 11 can move from the extended position towards the initial position. When the locking member 47 rotates a first angular distance in the second rotational direction 75 towards the first orientation, the shield resistance surface 89 is no longer directly above the proximal end of the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Instead, the shield resistance surface 89 is directly above the recess within the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Thus, the shield 11 can move from the extended position towards the initial position. When the locking member 47 rotates a first angular distance in the second rotational direction 75 towards the first orientation, the shield resistance surface 89 is no longer directly above the proximal end of the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Instead, the shield resistance surface 89 is directly above the recess within the inner shield portion 31 in the direction of the longitudinal axis of the training device 1. Thus, the shield 11 can move from the extended position towards the initial position.

[0104] As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. As the shield 11 moves from the extended position and returns towards the initial position, the angled contact surface 73 of the shield 11 exerts a force on the inclined surface 71 of the locking member 47. This causes the locking member 47 to move in the second rotational direction 75 towards the first orientation. As the inner shield portion 31 moves proximally, the stop portion 67 and the elastic member 85 flex inwardly so that the stop portion 67 passes under the proximal end of the inner shield portion 31. As the inner shield portion 31 moves further, the stop portion 67 moves into the recess 69, and the recess 69 holds the shield 11 in the initial position as described above. Additionally, when the shield 11 reaches the initial position, the locking member 47 is as described above. has finished rotating in the first direction. Therefore, the training device 1 can be reset to the configuration described with reference to FIG. 2B. can be returned.

[0105] To reset the device, the shield 11 can be manually moved from the extended position towards the initial position. However, this requires the user to move the shield 11 to the initial position and simultaneously move the actuator 9 to the proximal position to reset the device, which requires the use of both hands and is not desirable. Referring to FIG. 9, when the actuator 9 is pulled from the distal position to the proximal position, a reset connector 91 is provided that automatically pulls the shield 11 from the extended position to the initial position. Referring to FIG. 9, when the actuator 9 is pulled from the distal position to the proximal position, a reset connector 91 is provided that automatically pulls the shield 11 from the extended position to the initial position. .

[0106] The reset connector 91 is a fixed-length rod having an actuator interface such as a first hook 93 at its proximal end. The first hook 93 is arranged to be interlocked with a part of the actuator 9, such as a shelf portion 95 on the inner side member 39 of the actuator 9. Since the shelf portion 95 faces in the proximal direction, the proximal movement of the actuator causes the reset connector 91 to move in the proximal direction when the shelf portion 95 contacts the first hook 93. However, the distal movement of the actuator 9 does not move the reset connector 91 in this direction because the actuator 9 cannot apply a force in this direction to the first hook 93.

[0107] The rest connector 91 also has a shield interface such as a second hook 97 at its distal end. The second hook 97 is received, for example, by an opening 92 of the shield 11. ​​​​​​​​​​It is arranged to abut against a part of the shield 11. When the actuator moves towards the proximal position and the reset connector 91 moves in the proximal direction, the proximal end 92a of the opening 92 contacts the second hook 97. Thereby, the reset connector 91 can pull the shield 11 towards the initial position in order to reset the training device 1.

[0108] As shown in FIG. 9, the opening 92 may be configured as an elongated opening extending distally along the inner shield portion 31. The second hook 97 may always be positioned within the opening during the operation of the training device 1. In these embodiments, in order to reset the training device 1, the reset connector 91 can pull the shield 11 towards the initial position. As described above, until the second hook 97 contacts the proximal end 92a of the opening, the second hook 97 follows a path along the opening 92 when the actuator 9 is moved distally from the proximal position shown in FIG. 2B to the distal position shown in FIG. 2E and then moved proximally from the distal position towards the proximal position.

[0109] The opening 92 may be formed in any suitable part of the shield 11. For example, the opening may be formed within the outer shield portion 29 and may function substantially the same as described above. The opening 92 may extend through the part of the shield in which the opening 92 is formed in a direction perpendicular to the longitudinal axis of the training device 1. Alternatively, the opening may be an etched part or a depression on the surface of the shield 11.

[0110] In some embodiments, including those shown in FIG. 9, the opening 92 has a closed distal end. This is also acceptable. Alternatively, the opening may be formed as a slot at the distal end of the inner and / or outer shield portion, having a closed proximal end 92a against which the second hook 97 abuts and an open distal end.

[0111] In some embodiments, the opening may not extend along the shield 11 distally such that the second hook 97 is always positioned within the opening during operation of the training device 1. For example, the opening 92 may be configured as a substantially circular opening within the shield 11. The reset rod 91 is configured such that when the actuator moves towards its proximal position, the second hook 97 is elastically biased into the opening, enabling contact between the second hook 97 and the proximal end 92a of the opening, and as a result, the shield 11 can be pulled towards its initial position to reset the training device 1. The distal end of the second hook 97 may be shaped to cam engage with the closed distal end of the opening. When the reset rod 91 moves distally as the actuator moves distally, the cam engagement between the second hook 97 and the distal end of the opening overcomes the elastic biasing, enabling the second hook 97 to disengage from the opening 92 as the actuator moves distally.

[0112] Referring to FIG. 10, the injection device training device 1 includes a latch 99 configured to be attached to the inner component 39 of the actuator 9. In this embodiment, the latch 99 includes one elastic wire formed in a loop 101 and arranged to be placed around a circular protrusion 103 on the inner component 39. Since the latch 99 is elastic, the diameter of the loop 101 ​​​​​​​​​​​​​​It can be extended to be arranged around the circular protrusion. Then, when the diameter of the loop 101 contracts so that the latch holds the circular protrusion 103, the loop can be released. The latch 9 9 is also configured to be located between a pair of holders 107 that hold the latch 99 in place. It includes a first extension 105. The latch 99 further includes a second extension 109 that is longer than the first extension 105 in this embodiment. The second extension 109 includes a first portion 111 that extends distally and a second portion 113 that is angled with respect to the first portion 1

[0113] 11. The second portion 113 forms a deflection portion on its distal side and a gripping element on its proximal side. After the actuator 9 moves a specific distance from the proximal position to the distal position, the second portion 113 contacts the body protrusion 115 on the main portion 23 of the body portion 3. When the actuator 9 moves distally, the elastic latch 99 bends outwardly away from the longitudinal axis of the training device 1 and onto the body protrusion 115. When the actuator 9 finishes moving to the distal position, the elastic latch 99 returns to its rest position. In this state, the angled surface of the latch 99 representing the gripping element connects the latch 99 to the body protrusion 115. This holds the actuator 9 in the distal position relative to the body portion 3. When the actuator 9 is moved from the distal position to the proximal position, the body protrusion 115 exerts a force on the latch 99. When this force exceeds the threshold value, the gripping element of the second portion 113 bends in a direction perpendicular to the direction extending away from the longitudinal axis of the training device 1. Thus, the gripping element is disengaged from the body protrusion 115, and the elastic latch 99 returns to its initial position, releasing the actuator 9. element disengages from the body protrusion 115, and the elastic latch 99 returns to its initial position, releasing the actuator 9.

[0114] When the actuator 9 moves distally, the elastic latch 99 bends outwardly away from the longitudinal axis of the training device 1 and onto the body protrusion 115. When the actuator 9 finishes moving to the distal position, the elastic latch 99 returns to its rest position. In this state, the angled surface of the latch 99 representing the gripping element connects the latch 99 to the body protrusion 115. This holds the actuator 9 in the distal position relative to the body portion 3. When the actuator 9 reaches the distal position, the elastic latch 99 returns to its stationary position. In this state, the angled surface of the latch 99 representing the gripping element connects the latch 99 to the body protrusion 115. This holds the actuator 9 in the distal position relative to the body portion 3. When the actuator 9 is moved from the distal position to the proximal position, the body protrusion 115 exerts a force on the latch 99. When this force exceeds the threshold value, the gripping element of the second portion 113 bends in a direction perpendicular to the direction extending away from the longitudinal axis of the training device 1. Thus, the gripping

[0115] When the actuator 9 is moved from the distal position to the proximal position, the body protrusion 115 exerts a force on the latch 99. When this force exceeds the threshold value, the gripping element of the second portion 113 bends in a direction perpendicular to the direction extending away from the longitudinal axis of the training device 1. Thus, the gripping element disengages from the body protrusion 115, and the elastic latch 99 returns to its initial position, releasing the actuator 9. element is disengaged from the body protrusion 115, and the elastic latch 99 returns to its initial position, releasing the actuator 9. The element passes through the body protrusion 115, whereby the actuator 9 is released from the distal position. The threshold force required to bend the latch ensures that the actuator 9 is securely held in the distal position. However, the threshold force also enables the actuator 9 to be pushed back to the proximal position when the gripping element releases the body protrusion. .

[0116] With reference to FIGS. 11A - 11B, the damping element 45 briefly described with reference to FIG. 4 will be described in more detail below.

[0117] In the training device 1, the plunger 41 of the actuator 9 has threads that engage with a rotor 117. The rotor 117 may include an internal thread 118 configured to engage the threads of the plunger 41 to facilitate the connection between the plunger 41 and the rotor 117. The plunger 41 is fixed to the inner component 39 of the actuator 9 so that the plunger does not rotate relative to the actuator 9. The rotor 117 is interlocked with the threads, and thus when the plunger 41 moves distally with the actuator 9, the rotor 117 rotates the rotor 117 in a second rotational direction 75. The rotor 117 is connected to a damping element 45, which in this embodiment is a torsion spring 119 biased towards a coiled state. When the rotor 117 rotates, the rotor 117 stretches the torsion spring 119, thereby damping the rotation of the rotor 117 and thus damping the movement of the actuator 9 towards the distal position. The characteristics of the spring 119 may be selected according to the desired resistance. For example, if a high resistance is desired, a spring 119 with a high spring constant may be selected.

[0118] The damping element 45 also has a plurality of angled teeth 130 which cooperate with the angled teeth 130 of the rotor 117. The actuator 9 is in a distal position. When the rotor 117 is moved a distance, the angled teeth of the rotor 117 move to engage the ratchet 121. The rotor 117 and ratchet 121 form an anti-rotation mechanism. The anti-rotation mechanism allows the rotor 117 to rotate in the second rotation direction 75. , which resists movement of the rotor in the first rotational direction 57. In this way, the rotor 117 When the torsion spring 119 is stretched, the torsion spring 119 is prevented from returning to its coiled state. Therefore, the tension of the torsion spring 119 is maintained.

[0119] Each of the angled teeth 130 of the rotor 117 has an angled edge 132 (e.g., 131 (angled relative to the longitudinal axis of the training device) and straight edge 131 (e.g. The rotor 117 may include a toothed portion having a length of about 10 mm and a width of about 10 mm. The angled edge may be configured to face the second rotational direction 75. In other words, The angled edge of each angled tooth is adapted to move the plunger 41 distally with the actuator 9. The rotor 117 takes the lead as it rotates. The angled teeth closely match the shape of the angled teeth of rotor 117. In other words, The straight edges of each tooth of the ratchet 121 are aligned so that the straight edges of the teeth of the rotor 117 are aligned with the ratchet 121. to abut corresponding straight edges of the teeth of the rotor 52 to resist movement of the rotor in the first rotational direction 57. The ratchet 121 faces the second direction of rotation 75 relative to the actuator 9. It may be rotatably fixed.

[0120] The damping element 45 and the rotor 117 are configured according to the point that engagement between the rotor 117 and the ratchet 121, and thus formation of the rotation prevention mechanism, is desired during pressing of the actuator. For example, in an embodiment where a spring 119 with a high spring constant is used, in order to assist the user in resisting the biasing of the spring 1 19 and returning to its coiled state, it may be desirable for the rotation prevention mechanism to engage at an early stage of the pressing of the actuator 9. Engagement at an early initial stage of the rotation prevention mechanism may be achieved, for example, by providing angled teeth of the ratchet 121 having a higher height along the longitudinal axis of the training device 1.

[0121] When the actuator 9 is pulled rather than pushed, or in other words, when the actuator 9 is moved proximally, the plunger 41 disengages the angled teeth of the rotor 117 from the angled teeth of the ratchet 121. Thereby, when the plunger 41 moves proximally and thereby moves the spring to return it to its coiled state, the rotor can move in the first rotational direction 57. The separation distance, that is, the distance by which the actuator 9, the plunger 41, and the rotor 117 are moved proximally to disengage the angled teeth of the rotor 117 from the angled teeth of the ratchet 121, is a distance greater than the height of the angled teeth of the ratchet along the longitudinal axis of the training device 1. In some embodiments , the separation distance can be about 2 mm.

[0122] The damping element may be implemented within the training device 1 to simulate high-volume processing and / or high-viscosity processing. The damping element may also prevent over-injection of the substance due to the injection being too rapid. ​​​​​​​​ to reduce harmful side effects such as subcutaneous bleeding, pain, and retention of the injected substance within the patient and may be used in an injection device to force the user to slowly push the actuator 9 when delivering a large volume or low-viscosity substance (which itself has little resistance to depression). when delivering a large volume or low-viscosity substance (which itself has little resistance to depression). It may also be used in an injection device to force the user to slowly push the actuator 9 when delivering a large volume or low-viscosity substance (which itself has little resistance to depression).

[0123] In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance. In an alternative embodiment of the damping element, the torsion spring may be coupled to the ratchet. Similar to the previous embodiment, the rotor is interlocked with the thread of the plunger, and thus the plunger rotates the rotor in a second rotational direction as the plunger moves distally with the actuator. In this embodiment, the rotor is configured such that the straight edge of each tooth faces in the second rotational direction. In other words, the straight edge of each angled tooth leads as the rotor rotates as the plunger moves distally with the actuator. The initial rotation of the rotor in this embodiment does not cause the torsion spring to stretch. Thus, the initial movement towards the distal position of the actuator experiences little or no resistance.

[0124] The alternative damping element comprises a ratchet coupled to a torsion spring biased towards a coiled state. The ratchet comprises a plurality of angled teeth interlocked with the angled teeth on the rotor. When the actuator is moved a certain distance towards the distal position, the angled teeth of the rotor move and engage with the angled teeth of the ratchet, such that the straight edge of the teeth of the rotor rotates and abuts against the corresponding straight edge of the teeth of the ratchet. In this embodiment, as the rotor and the ratchet move to engage with each other, the continuous rotation of the rotor causes The alternative damping element comprises a ratchet coupled to a torsion spring biased towards a coiled state. The ratchet comprises a plurality of angled teeth interlocked with the angled teeth on the rotor. When the actuator is moved a certain distance towards the distal position, the angled teeth of the rotor move and engage with the angled teeth of the ratchet, such that the straight edge of the teeth of the rotor rotates and abuts against the corresponding straight edge of the teeth of the ratchet. In this embodiment, as the rotor and the ratchet move to engage with each other, the continuous rotation of the rotor causes The alternative damping element comprises a ratchet coupled to a torsion spring biased towards a coiled state. The ratchet comprises a plurality of angled teeth interlocked with the angled teeth on the rotor. When the actuator is moved a certain distance towards the distal position, the angled teeth of the rotor move and engage with the angled teeth of the ratchet, such that the straight edge of the teeth of the rotor rotates and abuts against the corresponding straight edge of the teeth of the ratchet. In this embodiment, as the rotor and the ratchet move to engage with each other, the continuous rotation of the rotor causes The alternative damping element comprises a ratchet coupled to a torsion spring biased towards a coiled state. The ratchet comprises a plurality of angled teeth interlocked with the angled teeth on the rotor. When the actuator is moved a certain distance towards the distal position, the angled teeth of the rotor move and engage with the angled teeth of the ratchet, such that the straight edge of the teeth of the rotor rotates and abuts against the corresponding straight edge of the teeth of the ratchet. In this embodiment, as the rotor and the ratchet move to engage with each other, the continuous rotation of the rotor causes The alternative damping element comprises a ratchet coupled to a torsion spring biased towards a coiled state. The ratchet comprises a plurality of angled teeth interlocked with the angled teeth on the rotor. When the actuator is moved a certain distance towards the distal position, the angled teeth of the rotor move and engage with the angled teeth of the ratchet, such that the straight edge of the teeth of the rotor rotates and abuts against the corresponding straight edge of the teeth of the ratchet. In this embodiment, as the rotor and the ratchet move to engage with each other, the continuous rotation of the rotor causes The alternative damping element comprises a ratchet coupled to a torsion spring biased towards a coiled state. The ratchet comprises a plurality of angled teeth interlocked with the angled teeth on the rotor. When the actuator is moved a certain distance towards the distal position, the angled teeth of the rotor move and engage with the angled teeth of the ratchet, such that the straight edge of the teeth of the rotor rotates and abuts against the corresponding straight edge of the teeth of the ratchet. In this embodiment, as the rotor and the ratchet move to engage with each other, the continuous rotation of the rotor causes The ratchet rotates. The rotation of the ratchet stretches the torsion spring, which dampens the rotation of the ratchet and the rotor, and thus dampens further progression towards the distal position of the actuator Here too, the configuration of the damping element and the rotor, for example, the spring characteristics and the height of the teeth may be selected according to the desired resistance characteristics.

[0125] In some embodiments, the rotor 117 and / or the damping element 45 may be replaceable parts of a training device or an injection device. For example, the device may be configured such that the torsion spring 119 can be replaced with another spring of a higher or lower spring constant . This makes it easier, for example, to train the user with respect to delivering substances of various different viscosities using a single training device device.

[0126] The injection device in the context of the present application may be an automatic injection device (autoinjector). In such an injection device, the actuator 9 is operated by an automatic actuator such as a drive spring, a pneumatic piston operated by a compressed gas scanner, or a solenoid in an electric automatic injection device, or is replaced thereby.

[0127] In such an automatic injection device, the damping element 45 can be used to dampen, decelerate, or control the force applied by the actuator to the plunger of a drug container, such as a syringe, containing the substance to be injected. The damping element is useful for adjusting the injection speed by the autoinjector without the need for modification of the automatic actuator and is obtainable.

[0128] The damping element may be configured to operate during any part of the operating sequence. For example for example, the damping element may be configured such that the advancement of the actuator towards the distal position is damped over the entire duration of the advancement or only over a selected part. In some embodiments for example, to ensure complete delivery of the injected substance by an auto-injector, the injection device may be configured such that damping of the advancement of the actuator begins when the needle on the drug container is fully extended. Unless otherwise stated, each embodiment described in this specification may be combined with another embodiment described in this specification.

[0129] It will be understood that the above advantages and benefits may relate to one embodiment or may relate to several embodiments in connection. Embodiments are not limited to those that solve any or all of the problems described or have any or all of the advantages and benefits described. A reference to "an" item refers to one or more of those items.

[0130] A reference to an "element" in this specification may additionally correspond to a "means" that performs the specific function described for that element.

[0131] It will be understood that the above description of the preferred embodiments is given by way of example only and that various modifications may be made by those skilled in the art. Although the various embodiments have been described to a certain degree of particularity or with reference to one or more individual embodiments, those skilled in the art

[0132]

[0133] ​​​​​​​​Without departing from the scope of the present invention, many modifications can be made to the disclosed embodiments. It is possible.

[0134] Aspects of the present invention forming part of the detailed description: 1. An injection device training instrument for training a user who uses an injection device, a main body part, an actuator positioned toward the proximal end of the main body part, the actuator being movable from a proximal position to a distal position, a shield positioned toward the distal end of the main body part, the shield being movable between an initial position, a retracted position closer to the main body part than the initial position, and an extended position farther from the main body part than the initial position, a locking member adapted to be rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, The first orientation of the locking member is configured to hold the shield in the initial position so as to prevent the shield from moving from the initial position to the extended position, and to allow movement of the shield from the initial position to the retracted position, The shield is configured to contact the locking member when moving from the initial position to the retracted position in order to move the locking member from the first orientation to the second orientation, Movement of the actuator a first distance toward the distal position is configured to unlock the shield from the locking member so that the shield can move toward the extended position, An injection device training instrument. 2. The locking member includes at least one actuator resistance surface, and the actuator includes at least one contact surface, In the injection device training instrument according to aspect 1, at least one actuator resistance surface is arranged to abut against at least one abutment surface so as to resist the movement of the actuator from the proximal position to the distal position when the locking member is in the first orientation. 3. The locking member comprises a pair of actuator resistance surfaces, and the actuator comprises a pair of abutment surfaces. In the injection device training instrument according to aspect 1 or aspect 2, each actuator resistance surface of the pair of actuator resistance surfaces is arranged to abut against a corresponding abutment surface of the pair of abutment surfaces so as to resist the movement of the actuator from the proximal position to the distal position when the locking member is in the first orientation. 4. In the injection device training instrument according to aspect 3, the pair of actuator resistance surfaces are located on opposite sides of the locking member with respect to each other. 5. In the injection device training instrument according to aspect 3 or aspect 4, the locking member comprises a cylindrical housing, and each actuator resistance surface of the pair of actuator resistance surfaces comprises a protrusion protruding from the surface of the cylindrical housing. 6. In the injection device training instrument according to aspect 5, the pair of abutment surfaces are located on opposite sides of the actuator with respect to each other. 7. In the injection device training instrument according to any one of aspects 1 to 6, the locking member comprises an inclined surface, the shield comprises an inclined contact surface, and the inclined contact surface is configured to rotate the locking member from the first orientation to the second orientation by interacting with the inclined surface when the locking member moves from the initial position to the retracted position. 8. In the injection device training instrument according to any one of aspects 1 to 7, the locking member includes a third orientation in which the shield can move from the initial position to the extended position. 9. In the injection device training instrument according to aspect 8, the actuator is configured to move a first distance in order to move the locking member to the third orientation. 10. In the injection device training instrument according to aspect 8 or aspect 9, the locking member comprises a deflector, and the actuator is arranged to move the locking member from the second orientation to the third orientation in conjunction with the deflector. 11. The locking member comprises a stop portion arranged to hold the shield in the initial position by being located within a recess in the shield, the injection device training instrument according to any one of aspects 1 to 10. 12. To enable the shield to move to the extended position, the stop portion is arranged to move along a slot in the shield, the injection device training instrument according to aspect 11. 13. The stop portion is arranged to hold the shield in the initial position by being located outside the slot in the recess when the locking member is in the first orientation, the injection device training instrument according to aspect 12. 14. The locking member includes a third orientation that enables the shield to move from the initial position to the extended position, and the movement of the locking member from the second orientation to the third orientation pushes the stop portion into the slot to enable the shield to move from the initial position to the extended position, the injection device training instrument according to aspect 12 or aspect 13. 15. The stop portion is connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from the stationary state to the flexed state toward the longitudinal axis of the training instrument, the injection device training instrument according to any one of aspects 11 to 14. 16. The stationary stop portion holds the shield in the initial position, the injection device training instrument according to aspect 15. 17. The flexed stop portion enables the stop portion to move into the slot, the injection device training instrument according to aspect 15 or aspect 16. 18. The injection device training instrument according to any one of aspects 1 to 17 further comprises a biasing element arranged to bias the shield to move distally. 19. The locking member has a fourth orientation in which the locking member resists the shield moving from the extended position to the initial position, the injection device training instrument according to any one of aspects 1 to 18. 20. The injection device training instrument according to aspect 19 further comprises a biasing element arranged to bias the locking member toward the fourth orientation such that when the actuator moves a distance toward the distal position and the shield is in the extended position, the locking member moves to the fourth orientation. 21. The injection device training instrument according to aspect 20, wherein the biasing element comprises a torsion spring. 22. The injection device training instrument according to any one of aspects 19 to 21, wherein when the actuator moves from the distal position to the proximal position, the actuator is configured to move the shield from the extended position to the initial position by moving the locking member from the fourth direction to the first direction in conjunction with the locking member. 23. The injection device training instrument according to any one of aspects 19 to 22, wherein the locking member comprises a shield resistance surface arranged to resist the proximal movement of the shield when the locking member is in the fourth direction and the shield is in the extended position. 24. The injection device training instrument according to aspect 23, wherein the shield comprises a contact surface arranged to contact the shield resistance surface when the locking member is in the fourth direction and the shield is in the extended position. 25. The injection device according to any one of aspects 1 to 24, wherein the proximal position of the actuator simulates the non-operating position of the plunger of the injection device. 26. The injection device according to any one of aspects 1 to 25, wherein the distal position of the actuator simulates the operating position of the plunger of the injection device. 27. The injection device according to any one of aspects 1 to 26, wherein the initial position of the shield simulates covering the needle of the injection device. 28. The injection device according to any one of aspects 1 to 27, wherein the retracted position of the shield simulates exposing the needle of the injection device. 29. The injection device according to any one of aspects 1 to 28, wherein the extended position of the shield simulates the locked-out state of the injection device in which the shield prevents the needle from being exposed. 30. The actuator is connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor. The injection device training instrument further comprises a damping element connected to or connectable to the rotor for damping the rotation of the rotor. The injection device training instrument according to any one of aspects 1 to 29. 31. An injection device, a needle connected to a chamber for storing a fluid, a body portion, an actuator positioned toward the proximal end of the body portion, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle, a shield positioned toward the distal end of the body portion, the shield having an initial position covering the needle, a retracted position exposing the needle, the retracted position being more proximal to the body portion than the initial position, and an extended position covering the needle, the extended position being more distal to the body portion than the initial position, the shield being movable between the initial position, the retracted position, and the extended position, a locking member rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, the first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position and to allow movement of the shield from the initial position to the retracted position, the shield is configured to contact the locking member when moving from the initial position to the retracted position to move the locking member from the first orientation to the second orientation, movement of the actuator a first distance toward the distal position unlocks the shield from the locking member so that the shield can move toward the extended position, the injection device. 32. The actuator is connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, the injection device further comprises a damping element connected to or connectable to the rotor to damp the rotation of the rotor, The injection device according to claim 31. 33. A kit of parts configured to be assembled into the infusion device training device according to any one of aspects 1 to 30 or the infusion device according to aspect 31 or 32. 34. A method for training a user to use an infusion device, the method comprising providing an infusion device training device, the infusion device training device comprising a body portion, an actuator positioned towards the proximal end of the body portion, the actuator being movable from a proximal position to a distal position, a shield positioned towards the distal end of the body portion, the shield being movable between an initial position, a retracted position closer to the body portion than the initial position, and an extended position further from the body portion than the initial position, a locking member rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, the first orientation of the locking member being configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position and to allow movement of the shield from the initial position to the retracted position, the method comprising moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, moving the actuator a first distance towards the distal position to unlock the shield from the locking member so that the shield moves towards the extended position, A method for training a user to use an infusion device, further comprising. 35. The actuator is connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, The infusion device training device further comprises a damping element connectable to the rotor for damping the rotation of the rotor, The method further includes moving the actuator from a proximal position to a distal position, during which a damping element damps the movement of the actuator towards the distal position by damping the rotation of the rotor. The method according to aspect 34. 36. A method of treating an injection, the method including providing an injection device, the injection device comprising a needle connected to a chamber for storing a fluid, a body portion, an actuator positioned towards the proximal end of the body portion, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle, a shield positioned towards the distal end of the body portion, the shield having an initial position covering the needle, a retracted position in which the shield exposes the needle, the retracted position being more proximal to the body portion than the initial position, and an extended position in which the shield covers the needle, the extended position being more distal to the body portion than the initial position, the shield being movable between the initial position, the retracted position, and the extended position, a locking member rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, The first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position and to allow movement of the shield from the initial position to the retracted position, The method includes moving the shield from the initial position to the retracted position such that the shield contacts the locking member to move the locking member from the first orientation to the second orientation, moving the actuator a first distance towards the distal position to unlock the shield from the locking member such that the shield moves towards the extended position, and further comprising a method of administering an injection. 37. The actuator is connected to the rotor such that movement of the actuator from a proximal position to a distal position rotates the rotor. The injection device further comprises a damping element connectable to the rotor for damping the rotation of the rotor. The method further comprises damping movement of the actuator towards the distal position by moving the actuator from the proximal position to the distal position while the damping element damps the rotation of the rotor. The method according to aspect 36. Examples of aspects corresponding to the claims at the time of filing are as follows. (Example 1) An injection device training instrument for training a user who uses an injection device, a main body portion, an actuator positioned toward the proximal end of the main body portion, the actuator being movable from a proximal position to a distal position, a shield positioned toward the distal end of the main body portion, the shield being movable between an initial position, a retracted position closer to the main body portion than the initial position, and an extended position farther from the main body portion than the initial position, a locking member adapted to be rotatable between a first direction in which the locking member resists movement of the actuator from the proximal position to the distal position and a second direction in which the locking member allows movement of the actuator from the proximal position to the distal position, the first direction of the locking member is configured to hold the shield in the initial position so as to prevent the shield from moving from the initial position to the extended position, and to allow movement of the shield from the initial position to the retracted position, the shield is configured to contact the locking member when moving from the initial position to the retracted position in order to move the locking member from the first direction to the second direction, a movement of the actuator a first distance toward the distal position is configured to unlock the shield from the locking member so that the shield can move toward the extended position, An injection device training instrument. (Example 2) The locking member includes at least one actuator resistance surface, and the actuator includes at least one contact surface, The at least one actuator resistance surface is arranged to abut against the at least one abutment surface so as to resist the movement of the actuator from the proximal position to the distal position when the locking member is in the first orientation, the injection device training instrument according to aspect example 1. (Aspect example 3) The locking member includes a pair of actuator resistance surfaces, and the actuator includes a pair of abutment surfaces. Each actuator resistance surface of the pair of actuator resistance surfaces is arranged to abut against a corresponding one of the pair of abutment surfaces so as to resist the movement of the actuator from the proximal position to the distal position when the locking member is in the first orientation, the injection device training instrument according to aspect example 1. (Aspect example 4) The pair of actuator resistance surfaces are located on opposite sides of the locking member, the injection device training instrument according to aspect example 3. (Aspect example 5) The locking member includes a cylindrical housing, and each actuator resistance surface of the pair of actuator resistance surfaces includes a protrusion protruding from the surface of the cylindrical housing, the injection device training instrument according to aspect example 3. (Aspect example 6) The pair of abutment surfaces are located on opposite sides of the actuator, the injection device training instrument according to aspect example 5. (Aspect example 7) The locking member includes an inclined surface, the shield includes an inclined contact surface, and the inclined contact surface is configured to rotate the locking member from the first orientation to the second orientation by interacting with the inclined surface when the locking member moves from the initial position to the retracted position, the injection device training instrument according to aspect example 1. (Aspect example 8) The locking member includes a third orientation in which the shield can move from the initial position to the extended position, the injection device training instrument according to aspect example 1. (Aspect example 9) The actuator is configured to move a first distance to move the locking member to the third orientation, the injection device training instrument according to aspect example 8. (Aspect example 10) The locking member includes a deflection portion, and the actuator is arranged to move the locking member from the second orientation to the third orientation in conjunction with the deflection portion, the injection device training instrument according to aspect example 8. (Aspect example 11) The injection device training instrument according to aspect example 1, wherein the locking member includes a stop portion disposed to hold the shield in the initial position by being located within a recess in the shield. (Aspect example 12) The injection device training instrument according to aspect example 11, wherein the stop portion is disposed to move along a slot in the shield to enable the shield to move to the extended position. (Aspect example 13) The injection device training instrument according to aspect example 12, wherein the stop portion is disposed to hold the shield in the initial position by being located outside the slot in the recess when the locking member is in the first orientation. (Aspect example 14) The injection device training instrument according to aspect example 12, wherein the locking member includes a third orientation that enables the shield to move from the initial position to the extended position, and movement of the locking member from the second orientation to the third orientation pushes the stop portion into the slot to enable the shield to move from the initial position to the extended position. (Aspect example 15) The injection device training instrument according to aspect example 11, wherein the stop portion is connected to an elastic member, and the elastic member is configured to bend to move the stop portion inward from a stationary state to a flexed state toward the longitudinal axis of the training instrument. (Aspect example 16) The injection device training instrument according to aspect example 15, wherein the stop portion in the stationary state holds the shield in the initial position. (Aspect example 17) The injection device training instrument according to aspect example 15, wherein the stop portion in the flexed state enables the stop portion to move within the slot. (Aspect example 18) The injection device training instrument according to aspect example 1, further comprising a biasing element disposed to bias the shield to move distally. (Aspect example 19) The injection device training instrument according to aspect example 1, wherein the locking member has a fourth orientation in which the locking member resists movement of the shield from the extended position to the initial position. (Aspect example 20) The injection device training instrument according to aspect example 19, further comprising a biasing element disposed to bias the locking member toward the fourth orientation such that when the actuator moves a distance toward the distal position and the shield reaches the extended position, the locking member moves to the fourth orientation. (Aspect example 21) The injection device training instrument according to aspect example 20, wherein the biasing element includes a torsion spring. (Aspect example 22) The injection device training instrument according to aspect example 19, wherein when the actuator moves from the distal position to the proximal position, the actuator is configured to move the lock member from the fourth direction to the first direction in conjunction with the lock member, thereby enabling the shield to move from the extended position to the initial position. (Aspect example 23) The injection device training instrument according to aspect example 19, wherein the lock member includes a shield resistance surface disposed to resist proximal movement of the shield when the lock member is in the fourth direction and the shield is in the extended position. (Aspect example 24) The injection device training instrument according to aspect example 23, wherein the shield includes a contact surface disposed to contact the shield resistance surface when the lock member is in the fourth direction and the shield is in the extended position. (Aspect example 25) The injection device training instrument according to aspect example 1, wherein the proximal position of the actuator simulates a non-operating position of a plunger of an injection device. (Aspect example 26) The injection device training instrument according to aspect example 1, wherein the distal position of the actuator simulates an operating position of a plunger of an injection device. (Aspect example 27) The injection device training instrument according to aspect example 1, wherein the initial position of the shield simulates covering a needle of an injection device. (Aspect example 28) The injection device training instrument according to aspect example 1, wherein the retracted position of the shield simulates exposing a needle of an injection device. (Aspect example 29) The injection device training instrument according to aspect example 1, wherein the extended position of the shield simulates a locked-out state of an injection device in which the shield prevents the needle from being exposed. (Aspect example 30) The actuator is connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor. The injection device training instrument according to aspect example 1 further includes a damping element connected to or connectable to the rotor to damp the rotation of the rotor. The injection device training instrument according to aspect example 1. (Aspect example 31) An injection device, a needle connected to a chamber for storing a fluid, a main body portion, An actuator positioned toward the proximal end of the main body portion, the actuator being movable from a proximal position to a distal position to dispense fluid stored in the chamber from the needle, A shield positioned toward the distal end of the main body portion, the shield having an initial position in which the shield covers the needle, a retracted position in which the shield exposes the needle, the retracted position being more proximal to the main body portion than the initial position, and an extended position in which the shield covers the needle, the extended position being more distal to the main body portion than the initial position, the shield being movable between the positions, A locking member rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, comprising a locking member, The first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position and to allow movement of the shield from the initial position to the retracted position, The shield is configured to contact the locking member when moving from the initial position to the retracted position to move the locking member from the first orientation to the second orientation, Movement of the actuator a first distance toward the distal position unlocks the shield from the locking member so that the shield can move toward the extended position, An injection device. (Aspect Example 32) The actuator is connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, The injection device further comprises a damping element connected to or connectable to the rotor to damp the rotation of the rotor, The injection device according to Aspect Example 31. (Aspect Example 33) A kit of parts configured to be assembled into the injection device trainer according to Aspect Example 1 or the injection device according to Aspect Example 31. (Aspect Example 34) A method for training a user to use an injection device, the method comprising providing an injection device trainer, the injection device trainer comprising A main body portion, An actuator positioned toward the proximal end of the body portion, the actuator being movable from a proximal position to a distal position A shield positioned toward the distal end of the body portion, the shield being movable between an initial position, a retracted position that is more proximal relative to the body portion than the initial position, and an extended position that is more distal relative to the body portion than the initial position A lock member rotatable between a first orientation in which the lock member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the lock member permits movement of the actuator from the proximal position to the distal position The first orientation of the lock member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position and to permit movement of the shield from the initial position to the retracted position The method Moving the shield from the initial position to the retracted position so that the shield contacts the lock member to move the lock member from the first orientation to the second orientation Moving the actuator a first distance toward the distal position to unlock the shield from the lock member so that the shield moves toward the extended position A method for training a user to use an injection device, further comprising (Aspect Example 35) The actuator is coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor The injection device trainer further comprises a damping element connectable to the rotor to damp the rotation of the rotor The method further comprises moving the actuator from the proximal position to the distal position, during which the damping element dampens movement of the actuator toward the distal position by dampening the rotation of the rotor The method according to Aspect Example 34 (Aspect Example 36) A method of handling an injection, the method comprising providing an injection device, the injection device comprising A needle coupled to a chamber for storing fluid A body portion An actuator positioned toward the proximal end of the main body portion, the actuator being movable from a proximal position to a distal position to dispense fluid stored in the chamber from the needle. A shield positioned toward the distal end of the main body portion, the shield having an initial position in which the shield covers the needle, a retracted position in which the shield exposes the needle, the retracted position being more proximal to the main body portion than the initial position, and an extended position in which the shield covers the needle, the extended position being more distal to the main body portion than the initial position, the shield being movable between the positions. A locking member rotatable between a first orientation in which the locking member resists movement of the actuator from the proximal position to the distal position and a second orientation in which the locking member allows movement of the actuator from the proximal position to the distal position, comprising a locking member. The first orientation of the locking member is configured to hold the shield in the initial position to prevent the shield from moving from the initial position to the extended position and to allow movement of the shield from the initial position to the retracted position. The method is Moving the shield from the initial position to the retracted position so that the shield contacts the locking member to move the locking member from the first orientation to the second orientation; and moving the actuator a first distance toward the distal position to unlock the shield from the locking member so that the shield moves toward the extended position. A method of administering an injection, further comprising. (Aspect Example 37) The actuator is coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor. The injection device further comprises a damping element connectable to the rotor to damp the rotation of the rotor, and the method further comprises moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator toward the distal position by dampening the rotation of the rotor. The method according to Aspect Example 36. (Aspect Example 38) An injection device training instrument for training a user to use an injection device, A main body portion, An actuator assembly positioned towards the proximal end of the body portion, wherein the actuator is movable from a proximal position to a distal position, and the actuator assembly is coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, the actuator assembly; A damping element connectable to the rotor to damp the rotation of the rotor; An injection device training instrument comprising. (Aspect Example 39) An injection device, A needle coupled to a chamber for storing fluid, A body portion, An actuator assembly positioned towards the proximal end of the body portion, wherein the actuator is movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle, and the actuator assembly is coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, the actuator assembly; A damping element connectable to the rotor to damp the rotation of the rotor; An injection device comprising. (Aspect Example 40) A method for training a user to use an injection device, the method comprising providing an injection device training instrument, the injection device training instrument comprising A body portion, An actuator assembly positioned towards the proximal end of the body portion, wherein the actuator is movable from a proximal position to a distal position, and the actuator assembly is coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, the actuator assembly; A damping element connectable to the rotor to damp the rotation of the rotor; Comprising, The method further comprises moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator towards the distal position by dampening the rotation of the rotor. A method for training a user to use an injection device. (Aspect Example 41) A method for handling an injection, the method comprising providing an injection device, the injection device comprising A needle coupled to a chamber for storing fluid, A body portion, An actuator assembly positioned toward the proximal end of the body portion, the actuator being movable from a proximal position to a distal position to dispense the fluid stored in the chamber from the needle, the actuator assembly being coupled to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, an actuator assembly; A damping element connectable to the rotor to damp the rotation of the rotor; Comprising; The method further includes moving the actuator from the proximal position to the distal position, during which the damping element dampens the movement of the actuator toward the distal position by dampening the rotation of the rotor. A method of treating an injection.

Claims

1. An injector training device for training a user who uses an injector, comprising: a main body portion; an actuator positioned toward the proximal end of the main body portion, the actuator being configured to be grasped by a user and to move from a proximal position to a distal position, the actuator being connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor; a damping element connected to or connectable to the rotor for damping the rotation of the rotor; 、 a shield positioned toward the distal end of the main body portion; and the shield is movable between an initial position, a retracted position closer to the main body portion than the initial position, and an extended position farther from the main body portion than the initial position. An injector training device.

2. The injector training device according to claim 1, wherein the proximal position of the actuator simulates a non-operating position of a plunger of the injector.

3. The injector training device according to claim 1, wherein the distal position of the actuator simulates an operating position of a plunger of the injector.

4. The injector training device according to claim 1, wherein the initial position of the shield simulates covering a needle of the injector.

5. The injector training device according to claim 1, wherein the retracted position of the shield simulates exposing a needle of the injector.

6. The injector training device according to claim 1, wherein the extended position of the shield simulates a locked-out state of the injector in which the shield prevents the needle from being exposed.

7. An injector training device for training a user who uses an injector, comprising: a main body portion; an actuator positioned toward the proximal end of the main body portion, the actuator being configured to be grasped by a user and to move from a proximal position to a distal position, the actuator being connected to a rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor; a damping element connected to or connectable to the rotor for damping the rotation of the rotor; and The damping element is a torsion spring biased towards a coiled state, and when the rotor rotates, the rotor extends the torsion spring, thereby damping the rotation of the rotor and thus damping the progression of the actuator towards the distal position, an injection device training instrument.

8. An injection device training instrument for training a user who uses an injection device, a main body portion, an actuator positioned towards the proximal end of the main body portion, the actuator being configured to be gripped by a user and move the actuator from a proximal position to a distal position, the actuator being connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, an actuator, a damping element connected to or connectable to the rotor for damping the rotation of the rotor, comprising, the damping element comprising a ratchet having a plurality of toothed angles that interact with the toothed angles of the rotor, an injection device training instrument.

9. The injection device training instrument according to claim 8, wherein the rotor and the ratchet form a rotation prevention mechanism that allows the rotor to rotate in a second rotation direction but resists movement in a first rotation direction.

10. An injection device, a needle connected to a chamber for storing a fluid, a main body portion, an actuator positioned towards the proximal end of the main body portion, the actuator being movable from a proximal position to a distal position for dispensing the fluid stored in the chamber from the needle, the actuator being connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, an actuator, a damping element connected to or connectable to the rotor for damping the rotation of the rotor, a shield positioned towards the distal end of the main body portion, comprising, the shield being movable between an initial position, a retracted position closer to the main body portion than the initial position, and an extended position further from the main body portion than the initial position, an injection device.

11. Comprising a shield positioned towards the distal end of the body portion, the shield being in an initial position where the shield covers the needle, a retracted position where the shield exposes the needle and is more proximal to the body portion than the initial position, and an extended position where the shield covers the needle and is more distal to the body portion than the initial position, and being movable between the positions, the injection device according to claim 10.

12. The injection device according to claim 11, wherein the extended position of the shield simulates a locked-out state of the injection device that prevents the shield from exposing the needle.

13. The damping element is a torsion spring biased towards a coiled state, and when the rotor rotates, the rotor extends the torsion spring, thereby damping the rotation of the rotor and thus damping the progression towards the distal position of the actuator, the injection device according to claim 10.

14. The damping element comprises a ratchet having a plurality of toothed elements that interlock with toothed elements of the rotor, the injection device according to claim 10.

15. The injection device according to claim 14, wherein the rotor and the ratchet form a rotation prevention mechanism that allows the rotor to rotate in a second rotation direction but resists movement in a first rotation direction.

16. The actuator is configured to be gripped by a user such that the actuator moves from a proximal position to a distal position, the injection device according to claim 10.

17. A method for training a user of an injection device with an injection device training device, wherein the injection device training device comprises a body portion, an actuator positioned towards the proximal end of the body portion, the actuator being movable from a proximal position to a distal position, the actuator being connected to the rotor such that movement of the actuator from the proximal position to the distal position rotates the rotor, a damping element connectable to the rotor for damping the rotation of the rotor, and a shield positioned towards the distal end of the body portion, and comprises The shield is movable between an initial position, a retracted position that is more proximal to the body portion than the initial position, and an extended position that is more distal to the body portion than the initial position. The method includes moving the actuator from the proximal position to the distal position in response to an operation of a user gripping the actuator, during which the damping element dampens the movement of the actuator toward the distal position by damping the rotation of the rotor. A method for training a user to use an injection device.

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